Processing method of garbage landfill

Abstract

The invention relates to a processing method for rapidly and completely clearing a garbage landfill. With the method, secondary pollution is not occurred. First, a garbage landfill is divided into zones with areas of 1000 to 10000 square meters, and garbage is cleared zone-by-zone. Garbage clearing is carried out by using a comprehensive system with subsystems of an excavation and transportation system, a garbage sorting system, a plastic pyrolysis and distillation system, an organic nutrient soil fertilizer-producing system, and a burning and vapor-producing system, which are related to each other. With the method provided by the invention, an original garbage landfill can be completely cleared and reused, such that a conflict between old garbage landfills and urban construction caused by rapid urban extension can be solved, and a large amount of valuable lands can be saved. The garbage is sorted, such that resources of metals, papers, and plastics can be obtained and reclaimed. With the method provided by the invention, resources that can be utilized are completely turned into resources, wastes are turned into valuable substances, and a pollution problem caused by garbage landfills is eliminated. Therefore, high management costs of garbage landfills are saved. According to the invention, garbage is comprehensively processed, and great economic benefits are generated in each link.

Description

technical field [0001] The invention relates to a treatment method for quickly and thoroughly clearing the landfill without causing secondary pollution. Background technique [0002] Municipal solid waste landfill is the most widely used waste treatment technology, which is used in about 90% of our country and more than 60% in developed countries. However, with the acceleration of urban expansion, the problem of increasing urban waste has become an extremely urgent problem for urban growth. China has surpassed the United States to become the world's number one producer of waste. The amount of garbage generated in Chinese cities is increasing at a rate of at least 6% per year. Beijing and Shanghai generate about 20,000 tons of garbage each day, and Guangzhou produces at least 8,000 tons of garbage a day. [0003] The important problems existing in the current landfill are as follows: 1. The landfill occupies a large area. Due to the slow decomposition speed of the garbage, t...

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Problems solved by technology

[0003] The important problems existing in the current landfill are as follows: 1. The landfill occupies a large area. Due to the slow decomposition speed of the garbage, the waste volume decreases slowly within a certain period of time, because the land recycling cycle of the garbage dump is long; 2. The landfill leachate is A highly polluted liquid in which the concentration of COD is 1000-9000mg / L, NH 4 + The concentration of SS is 70-3500mg / L, and the concentration of SS is 200-250mg / L. Conventional biochemical and physical-chemical treatments are difficult to meet the national environmental pollutant discharge standards, and landfill leachate can easily enter the soil and groundwater systems and cause serious pollution; 3. A large amount of biogas is produced during the process of garbage degradation. Biogas is a flammable and explosive gas, and improper management can easily cause explosion accidents. Biogas is a greenhouse gas that has serious damage to the ozone layer, and its destructive power is 24 times that of carbon dioxide gas.

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